Round 3:
Ch 3, 3dc into next dc, *1 dc into next dc, [ch 2, 1 dc into next dc] two times, 3 dc into next dc; repeat from * two more times, [1 dc into next dc, ch 2] two times, join with sl st into 3rd chain of beginning ch 3.

Round 4:
Ch 5, skip 1 dc, 1 dc into next dc, ch 2, skip one dc, 1dc in next dc and ch 2 space, 3dc into next dc, 1dc in ch 2 space and next dc, *[ch 2, skip one dc, 1 dc in next dc] two times, 1 dc in the ch 2 space, 3 dc in the next dc, 1 dc in the ch 2 space and the next dc; repeat from * one more time, [ch 2, skip one dc, 1 dc in next dc] two times, 1 dc in the ch 2 space, 3 dc in the next dc, 1 dc in the ch 2 space, join with sl st into 3rd chain of beginning ch 5.

Round 5:
Ch 5, skip next ch 2 space, 1 dc in next dc, ch 2, *1 dc in next three dc, 3dc in next dc, 1 dc in next three dc, ch 2, 1 dc in next dc, ch 2; repeat from * twice more, 1 dc in next three dc, 3 dc in next dc, 1 dc in next two dc, join with sl st into 3rd chain of beginning ch 5. (checked)

Round 6:
Ch 3, 1 dc in ch 2 space, 3dc in next dc, 1 dc in ch 2 space, 1 dc in next three dc, *ch 2, skip one dc, 1 dc in the next dc, ch 2, skip one dc, 1 dc in the next three dc, 1 dc in ch 2 space, 3dc in the next dc, 1dc in ch 2 space, 1 dc in next three dc, repeat from * twice more, ch 2, skip one dc, 1dc in next dc, ch 2, skip one dc, 1 dc in the next two dc, join with sl st into 3rd chain of beginning ch 3. (checked)

Round 7:
Ch 3, 1 dc in the next two dc, * 3 dc in the next dc, 1 dc in the next five dc, ch 2, 1 dc in next dc, ch 2, 1 dc in next five dc, repeat from * two more times, 3 dc in next dc, 1 dc in next five dc, ch 2, 1dc in next dc, ch 2, 1 dc in next two dc, , join with sl st into 3rd chain of beginning ch 3. Fasten off. (checked)

Round 8:
Connect yarn three stitches to the left of a corner stitch (Or, join yarn in last stitch of Round 7), ch 1, sc around, sl st into first sc . (Put 2 sc in each ch 2 space to avoid any curling).